for Japanese


19 June, 2015

NRA Confirms Additional Effective Dose Reduction at Fukushima Daiichi Boundaries

At its regular meeting on June 17, Japan's Nuclear Regulation Authority (NRA) confirmed that the additional effective doses from radioactive waste had been reduced to less than 2mSv/year at the boundaries of the Fukushima Daiichi Nuclear Power Station.

In accordance with an implementation plan that the Tokyo Electric Power Co. (TEPCO) had submitted to the NRA on June 8, the company evaluated additional effective doses stemming from radioactive waste in light of the treatment of contaminated water as of the end of March 2015, and found it to be 1.44mSv/year at maximum.

The NRA secretariat then measured the concentration of radioactive materials by sampling contaminated water from various groups of tanks. Doing so, it confirmed the amounts of contaminated water stored, then carried out further analysis. As a result, it concluded that the evaluation by TEPCO was appropriate.

According to the revised medium-and-long-term roadmap for decommissioning for Fukushima Daiichi’s Units 1-4, released on June 12, water that has already been treated will undergo additional treatment by multi-nuclide removal equipment to reduce the additional effective dose to less than 1mSv/year at the boundaries of station by the end of FY15 (i.e., by March 31, 2016). (For further details, see the article entitled “Government Revises Roadmap for Medium-term and Long-term Decommissioning of Fukushima Daiichi.”)


This site uses Akismet to reduce spam. Learn how your comment data is processed.

SNS facebooktwitter

NPPs Map


Fukushima Daiichi Nuclear Power Station -The year in review- (March 2018 – February 2019)

8 March, 2019
Fukushima Daiichi Nuclear Power Station -The year in review- (March 2018 – February 2019)04:56

Recent News

20 May, 2019
【52nd JAIF Annual Conference】 Leader Perspective: “French Nuclear Policy and Industry Update”
20 May, 2019
【52nd JAIF Annual Conference】 Session 3: “Diversity and Possibilities for Nuclear Technology”
15 May, 2019
【52nd JAIF Annual Conference】 Session 2: “Prospects for Development of Innovative Technology”
15 May, 2019
【52nd JAIF Annual Conference】 Fukushima Daiichi Report
15 May, 2019
【52nd JAIF Annual Conference】 Session 1: “Role of Nuclear Power as a Low-Carbon Energy Source”
10 May, 2019
JT60-SA’s Core Central Solenoid Installed at QST’s Naka Fusion Institute
10 May, 2019
President of Decommissioning Company Says “Feel” from Unit 3 Will Aid Decommissioning of Other Units
10 May, 2019
Demonstration Made by MHI and IRID of Robot Arm to Remove Fuel Debris from Fukushima Daiichi
24 April, 2019
【52nd JAIF Annual Conference】 JAIF Chairman Emphasizes Urgent Need for CO2-Free Nuclear Power
24 April, 2019
Electric Power Companies Ask NRA for Understanding on Extending Grace Period for Building Anti-Terrorism Facilities at NPPs